QGISHydro Webinar 6: Calculating Percentage of Land Cover per Subcatchment

In this series of 7 free webinars during the Corona Crisis, Kurt Menke and Hans van der Kwast demonstrate the 7 chapters of the book QGIS for Hydrological Applications - Recipes for Catchment Hydrology and Water Management.

In this 6th webinar we demonstrate how to calculate the percentage of land cover per subcatchment using vector processing tools and the field calculator. We also show how to present the results in a pie chart using the DataPlotly plugin. In this webinar we had a special guest: Matteo Ghetta, the developer of the DataPlotly plugin. He shows us some nice new features!

Join us next Friday from 9 pm CEST / 7 pm UTC. Go to http://loc8.cc/qgishydro for registration, more info and background materials.

The book is available at http://locatepress.com/hyd


0:00 Introduction QGISHydro Webinar 6
9:24 Introduction demo Calculating Percentage of Land Cover per Subcatchment
11:03 Start demo Calculating Percentage of Land Cover per Subcatchment
16:54 Download open data (CORINE Land Cover 2018) from the EU Copernicus portal
19:30 Style vector land cover layer with a .qml file
24:28 Reclassify CORINE level 3 to level 1
26:56 Dissolve features
28:45 Intersect land cover with catchment boundaries
34:15 Calculate areas and percentage in the attribute table
36:45 Add class names to class numbers with the CASE WHEN ELSE END function
39:56 Create a pie chart with the DataPlotly plugin
43:13 Matteo Ghetta demostrates DataPlotly plugin
1:00:16 Shameless plugs